Refrigerator



(No Model.)

W. O. TRU-SSELL.

. REFRIGERATOR. No. 486341. Patented Nov. 22; 1892.

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NITED STATES PATENT OFFICE.

WILBURT O. TRUSSELL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE TRUSSELLAUTOMATIC FREEZER COMPANY, OF MAINE.

REFRIGERATOR.

SPECIFICATION forming part of Letters Patent No. 486,841, dated November22, 1892. Application filed December 1, 1891. Serial No. 413,694. (Nomodel.)

To all whom it may concern.-

Be it known that I, WILBURT C. TRUSSELL, of Boston, in, the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Refrigerators,

of which the following is a specification.

This invention has for its object to provide a refrigerator orrefrigerating structure comprising a storage-chamber and a surrounding1o air-space cooled by a chemical refrigerating composition.

The invention consists in the improved refrigerator, which I will nowproceed to describe.

Of the accompanying drawings, forming part of this specification, Figure1 represents a perspective view of a refrigerator embodying myinvention, portions of the walls being broken away. Fig. 2 represents ahorizontal section of the same.

The same letters of reference indicate the same parts in both thefigures.

In carrying out my invention I provide a refrigerating structure orchamber having outer walls a and inner walls a, separated from the outerwalls by an air-space a which preferably entirely surrounds thestoragechamber a which is bounded by the inner walls a. In the air-spaceat at one side of the 0 structure I place one or more cans 0rreceptacles a containing a chemical refrigerating composition, and inthe air-space at the opposite side I place one or more cans a containinga similar refrigerating composition. Said composition is ahighly-concentrated refrigerant and is adapted to be contained in smallcompass and to exercise a refrigerific effect upon the air in the spacea to such an extent as to reduce the tem- 40 perature in thestorage-chamber a to any desired extent. I have succeeded in maintainingfor several days a temperature below freezing in a chamber ten feetsquare and seven feet high by the use of three cans of the refrigeratingmaterial placed in a surrounding air-space not over four or five inches1 wide, the cans being of such size as to fill only a small portion ofsaid air-space.

The refrigerating compound or compos1- tion which I have used withsatisfactory resuits consists of muriate of ammonia, bicarbonate ofsoda, permanganate of potash, nitrate of potash and brine, in which isplaced a suitable quantity of ice, the whole being placed in the cans aa I. do not limit myself, however, to this particular composition, butmay use any other suitable composition or mixture that will produce thedesired effect.

I find that by placing cans containing a mixture such. as that abovedescribed in a closed or sealed air-space surrounding a storage-chamberand dividing the cans into two groups or elements, so to speakonelocated at one side of the storage-chamber and the other at the oppositeside-I provide a very effective arrangement for reducing the temperaturethroughout'the entire air-space t0 the desired point and effecting asimilar reduction in the storage-chamber.

It will be seen that this improved refrigerator is extremely compact andsimple, re

quiring no external apparatus, as in ,oth er chemical refrigerators, andno internalspace necessarily devoted to the storage of ice, as 7 5 inordinary ice-refrigerators, the entire refrigerific effect beingproduced within the air-space surrounding the storage -chamber, and saidair-space may be as narrow as may be desired for the sake ofcompactness.

I do not limit myself to the described arrangement of the cans a a, butprefer that shown, because I have found that said arrangement is veryeffective and satisfactory. This principle may be applied to portablerefrigerators, stationary refrigerators, cars, and, in fact, to anystructures used for refrigerating purposes.

(1 represents the door through which access is had to thestorage-chamber, and e represents doors in the outer Walls a to affordaccess to the space between the inner and outer walls for the insertionand removal of the cans a There being no connection between thestoragechamberand the surrounding refrigerating air-space, noopportunity is afforded for any deleterious action upon the contents 10space, said cans being entirely independent or free from externalconnections, substantially as described 2. A refrigerator orrefrigerating structure having a storage-chamber, a closed air-space 15surrounding said chamber and having no connection therewith, and groupsof portable refrigerating-cans located in said air-space at oppositesides of the storage-chamber, said cans having no connection with eachother nor with the exterior of the structure, sub- 20 stantially asdescribed.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing Witnesses, this 24th day of November, A. D.1891.

WILBURT O. TRUSSELL.

Witnesses:

O. F. BROWN, A. D. HARRISON.

